名词
中文翻译：隧道挖掘
同义词：
['digging', 'tunneling', 'excavation例句：1. The engineers are tunneling through the mountain to reach the top.（工程师们正在穿过山丘到达山顶。）']
例句：
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1. The engineers are tunneling through the mountain to reach the top.
工程师们正在穿过山丘到达山顶。
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2.They were tunneling through the rocky terrain when they heard a loud noise.
当他们听到一声巨响时，他们正在穿越岩石地带。
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3. The tunneling project is expected to take several months to complete.
预计这个隧道项目需要几个月才能完成。